Intermediate D3 for Data Visualization - Project Module 1

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Bar Chart</title>
		<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
		<style type="text/css">
			
			body {
				margin: 0;
				background-color: lightGray;
				font-family: Helvetica, Arial, sans-serif;
			}

#container {
				width: 700px;
				margin-left: auto;
				margin-right: auto;
				margin-top: 50px;
				padding: 50px;
				background-color: white;
				box-shadow: 3px 3px 5px 6px #ccc;
			}

h1 {
				font-size: 24px;
				margin: 0;
			}

p {
				font-size: 14px;
				margin: 10px 0 0 0;
			}

svg {
				background-color: white;
			}

/* New CSS rules for bar groups! */
            
            g.bar {
                cursor: pointer
            }

g.bar text {
				font-size: 11px;
				font-weight: bold;
				text-anchor: end;
				opacity: 0;
			}

g.bar:hover rect {
				fill: orange;
			}

g.bar:hover text {
				opacity: 1;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
	</head>
	<body>
        
        <div id="container">

<h1>Primary Schools in the Province of Groningen</h1>

<p>The number of primary schools per 10,000 residents by municipality in the Province of Groningen. Source: DUO - Dienst Uitvoering Onderwijs, 2013</p>

</div>

var w = 700;
			var h = 500;
			var padding = [ 20, 10, 30, 125 ];  //Top, right, bottom, left

var widthScale = d3.scale.linear()
								.range([ 0, w - padding[1] - padding[3] ]);
			
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([ padding[0], h - padding[2] ], 0.1);

var xAxis = d3.svg.axis()
							.scale(widthScale)
							.orient("bottom");

var yAxis = d3.svg.axis()
							.scale(heightScale)
							.orient("left");

var svg = d3.select("#container")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

d3.csv("basisscholen_in_Groningen.csv", function(data) {

data.sort(function(a, b) {
					return d3.descending(+a.scholen_basisonderwijs_per_10000_inwoners, +b.scholen_basisonderwijs_per_10000_inwoners);
				});

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d.scholen_basisonderwijs_per_10000_inwoners;
				}) ]);

heightScale.domain(data.map(function(d) { return d.gemeente; } ));
                
                //Bind data to groups (not bars directly)
				var groups = svg.selectAll("g")
								.data(data)
								.enter()
								.append("g")
								.attr("class", "bar");
								//"bar" class help us differentiate these groups
								//from the groups created later for axes

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + padding[3] + ",0)")
					.call(yAxis);

});

</script>

</body>
</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js